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PuTTY 0.84 Update Patches SSH Key Exchange Crash Issues and Telnet Prompt Spoofing Flaw

Gbhackers •Divya • May 26, 2026

PuTTY 0.84 has been released with three minor security fixes that address issues that could allow remote attackers to crash the client or trick users during insecure sessions. Although the vulnerabilities are classified as low severity, they affect core components such as SSH key exchange and Telnet session handling, making the update important for users […]

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PuTTY 0.84 Fixes SSH KEX Crashes and Telnet Spoofing Vulnerabilities PuTTY 0.84 has been released, addressing three minor security vulnerabilities related to SSH key exchange crashes and Telnet prompt spoofing. These flaws could allow remote attackers to crash the PuTTY client or deceive users during insecure sessions. Although classified as low severity, they impact critical components of the software, which is widely used for secure shell access. Users of PuTTY are advised to update to the latest version to mitigate these risks. The vulnerabilities highlight the importance of maintaining updated software to protect against even minor threats that can be exploited in specific scenarios. 2 sources 28

Extracted Entities

Tools (3)

Putty SSH Telnet